EP3669482A1 - Signaux de synchronisation (ss) à multiplexage par répartition en fréquence pour un fonctionnement à large bande - Google Patents

Signaux de synchronisation (ss) à multiplexage par répartition en fréquence pour un fonctionnement à large bande

Info

Publication number
EP3669482A1
EP3669482A1 EP18759201.9A EP18759201A EP3669482A1 EP 3669482 A1 EP3669482 A1 EP 3669482A1 EP 18759201 A EP18759201 A EP 18759201A EP 3669482 A1 EP3669482 A1 EP 3669482A1
Authority
EP
European Patent Office
Prior art keywords
blocks
different
measurement
frequency
beams
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP18759201.9A
Other languages
German (de)
English (en)
Inventor
Haitong Sun
Hung Ly
Tingfang Ji
Peter Gaal
Alexei Yurievitch Gorokhov
Tao Luo
Muhammad Nazmul ISLAM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of EP3669482A1 publication Critical patent/EP3669482A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0891—Non-scheduled access, e.g. ALOHA using a dedicated channel for access for synchronized access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2615—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid frequency-time division multiple access [FDMA-TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to the use of synchronization signals (SS) for different purposes, including beam selection and management.
  • SS synchronization signals
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power).
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a wireless multiple-access communication system may include a number of base stations, each simultaneously supporting communication for multiple communication devices, otherwise known as user equipment (UEs).
  • UEs user equipment
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with a number of central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), where a set of one or more distributed units, in communication with a central unit, may define an access node (e.g., a new radio base station (NR BS), a new radio node-B (NR NB), a network node, 5G NB, gNB, gNodeB, etc.).
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • RHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a base station or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and uplink channels (e.g., for transmissions from a UE to a base station or distributed unit).
  • downlink channels e.g., for transmissions from a base station or to a UE
  • uplink channels e.g., for transmissions from a UE to a base station or distributed unit
  • NR new radio
  • 3GPP Third Generation Partnership Project
  • certain wireless systems may employ directional beams for transmission and reception.
  • Certain aspects of the present disclosure provide a method for wireless communication that may be performed, for example, by a network entity.
  • the method generally includes identifying one or more time intervals for transmitting synchronization signal (SS) blocks for one or more user equipments (UEs) to use for at least one of initial access or measurement purposes and transmitting, within one of the time intervals, SS blocks at different frequency locations using frequency division multiplexing (FDM).
  • SS synchronization signal
  • UEs user equipments
  • Certain aspects of the present disclosure provide a method for wireless communication that may be performed, for example, by a UE.
  • the method generally includes receiving, within one of time intervals, synchronization signal (SS) blocks transmitted at different frequency locations using frequency division multiplexing (FDM) and performing at least one of initial access or measurement based on the SS blocks.
  • SS synchronization signal
  • FDM frequency division multiplexing
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram illustrating an example logical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • FIG. 3 is a diagram illustrating an example physical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • FIG. 4 is a block diagram conceptually illustrating a design of an example BS and UE, in accordance with certain aspects of the present disclosure.
  • FIG. 5 is a diagram showing examples for implementing a communication protocol stack, in accordance with certain aspects of the present disclosure.
  • FIG. 6 illustrates an example of a DL-centric subframe, in accordance with certain aspects of the present disclosure.
  • FIG. 7 illustrates an example of an UL-centric subframe, in accordance with certain aspects of the present disclosure.
  • FIG. 8 example transmission timeline of synchronization signals for a new radio telecommunications system, in accordance with aspects of the present disclosure.
  • FIG. 9 illustrates an example resource mapping for an exemplary SS block, in accordance with aspects of the present disclosure.
  • FIG. 10 illustrates example operations that may be performed by a network entity, in accordance with certain aspects of the present disclosure.
  • FIG. 11 illustrates example operations that may be performed by a user equipment (UE), in accordance with certain aspects of the present disclosure.
  • UE user equipment
  • FIG. 12 is a graph illustrating an example of SS blocks being transmitted at different frequencies and times in accordance with an aspect of the present disclosure.
  • aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for new radio (NR) (new radio access technology or 5 G technology).
  • NR new radio access technology
  • NR may support various wireless communication services, such as Enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g. 80 MHz beyond), millimeter wave (mmW) targeting high carrier frequency (e.g. 60 GHz), massive MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra reliable low latency communications (URLLC).
  • eMBB Enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive MTC
  • URLLC ultra reliable low latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • Certain multi-beam wireless systems such as mmW systems, bring gigabit speeds to cellular networks, due to availability of large amounts of bandwidth.
  • mmW systems bring gigabit speeds to cellular networks, due to availability of large amounts of bandwidth.
  • hybrid beamforming analog and digital
  • SNR link budget/signal to noise ratio
  • the node B (NB) and the user equipment (UE) may communicate using beam-formed transmissions.
  • the NB may need to monitor beams using beam measurements performed (e.g., based on reference signals transmitted by the NB) and feedback generated at the UE.
  • the UE may need to evaluate several beams to obtain the best Rx beam for a given NB Tx beam. Accordingly, if the UE has to "sweep" through all of its Rx beams to perform the measurements (e.g., to determine the best Rx beam for a given NB Tx beam), the UE may incur significant delay in measurement and battery life impact. Moreover, having to sweep through all Rx beams is highly resource inefficient.
  • aspects of the present disclosure provide techniques to assist a UE when performing measurements of serving and neighbor cells when using Rx beamforming.
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM).
  • GSM Global System for Mobile Communications
  • An OFDMA network may implement a radio technology such as NR (e.g.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS).
  • NR is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF).
  • 3GPP Long Term Evolution (LTE) and LTE- Advanced (LTE- A) are releases of UMTS that use E-UTRA.
  • LTE Long Term Evolution
  • LTE- A LTE- Advanced
  • UTRA, E-UTRA, UMTS, LTE, LTE- A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).
  • cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies.
  • aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • FIG. 1 illustrates an example wireless network 100 in which aspects of the present disclosure may be performed.
  • the wireless network may be a NR or 5G network which may support mmW communication.
  • mmW communication depends on beamforming to meet link margin.
  • mmW communication may use directional beamforming, so transmission of signaling is directional.
  • a transmitter may focus transmission energy in a certain narrow direction (e.g., beams may have a narrow angle), as illustrated in FIG. 8.
  • a receiving entity may use receiver beamforming to receive the transmitted signaling.
  • the UEs 120 may be configured to perform the operations 900 and methods described herein for UE receiver beamforming.
  • BS 110 may comprise a transmission reception point (TRP), Node B (NB), 5G NB, access point (AP), new radio (NR) BS, Master BS, primary BS, etc.).
  • TRP transmission reception point
  • NB Node B
  • 5G NB access point
  • AP access point
  • NR new radio
  • the NR network 100 may include the central unit.
  • the wireless network 100 may include a number of BSs 110 and other network entities.
  • the network entities including the BS and UEs may communicate on high frequencies (e.g., > 6 GHz) using beams.
  • a BS may be a station that communicates with UEs. Each BS 110 may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a coverage area of a Node B and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used.
  • the term "cell” and gNB, Node B, 5G NB, AP, NR BS, NR BS, or TRP may be interchangeable.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station.
  • the base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.).
  • CSG Closed Subscriber Group
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS HOx may be a pico BS for a pico cell 102x.
  • the BSs HOy and HOz may be femto BS for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple (e.g., three) cells.
  • the wireless network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS).
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 11 Or may communicate with the BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • the wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt).
  • the wireless network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another, e.g., directly or indirectly via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video
  • Some UEs may be considered evolved or machine-type communication (MTC) devices or evolved MTC (eMTC) devices.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (e.g., remote device), or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices.
  • IoT Internet-of-Things
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a 'resource block') may be 12 subcarriers (or 180 kHz). Consequently, the nominal FFT size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10 or 20 megahertz (MHz), respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks), and there may be 1, 2, 4, 8 or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • aspects of the examples described herein may be associated with LTE technologies, aspects of the present disclosure may be applicable with other wireless communications systems, such as NR.
  • NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD.
  • a single component carrier bandwidth of 100 MHz may be supported.
  • NR resource blocks may span 12 sub-carriers with a sub- carrier bandwidth of 75 kHz over a 0.1 ms duration.
  • each radio frame may consist of 50 subframes with a length of 10 ms. Consequently, each subframe may have a length of 0.2 ms.
  • each radio frame may consist of 10 subframes with a length of 10 ms, where each subframe may have a length of 1 ms.
  • Each subframe may indicate a link direction (i.e., DL or UL) for data transmission and the link direction for each subframe may be dynamically switched.
  • Each subframe may include DL/UL data as well as DL/UL control data.
  • UL and DL subframes for NR may be as described in more detail below with respect to FIGs. 6 and 7.
  • Beamforming may be supported and beam direction may be dynamically configured.
  • MIMO transmissions with precoding may also be supported.
  • MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • NR may support a different air interface, other than an OFDM-based.
  • NR networks may include entities such CUs and/or DUs.
  • a scheduling entity e.g., a base station
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more subordinate entities (e.g., one or more other UEs).
  • the UE is functioning as a scheduling entity, and other UEs utilize resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may optionally communicate directly with one another in addition to communicating with the scheduling entity.
  • a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.
  • a RAN may include a CU and DUs.
  • a NR BS e.g., gNB, 5G Node B, Node B, transmission reception point (TRP), access point (AP)
  • TRP transmission reception point
  • AP access point
  • NR cells can be configured as access cells (ACells) or data only cells (DCells).
  • the RAN e.g., a central unit or distributed unit
  • the cells e.g., a central unit or distributed unit
  • DCells may be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection/reselection, or handover. In some cases, DCells may not transmit synchronization signals - in some case cases DCells may transmit SS.
  • NR BSs may transmit downlink signals to UEs indicating the cell type. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based on the indicated cell type.
  • FIG. 2 illustrates an example logical architecture of a distributed radio access network (RAN) 200, which may be implemented in the wireless communication system illustrated in FIG. 1.
  • a 5G access node 206 may include an access node controller (ANC) 202.
  • the ANC may be a central unit (CU) of the distributed RAN 200.
  • the backhaul interface to the next generation core network (NG-CN) 204 may terminate at the ANC.
  • the backhaul interface to neighboring next generation access nodes (NG ANs) may terminate at the ANC.
  • the ANC may include one or more TRPs 208 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, or some other term). As described above, a TRP may be used interchangeably with "cell.”
  • the TRPs 208 may be a DU.
  • the TRPs may be connected to one ANC (ANC 202) or more than one ANC (not illustrated).
  • ANC ANC
  • RaaS radio as a service
  • a TRP may include one or more antenna ports.
  • the TRPs may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the local architecture 200 may be used to illustrate fronthaul definition.
  • the architecture may be defined that support fronthauling solutions across different deployment types. For example, the architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter).
  • the architecture may share features and/or components with LTE.
  • the next generation AN (NG-AN) 210 may support dual connectivity with NR.
  • the NG-AN may share a common fronthaul for LTE and NR.
  • the architecture may enable cooperation between and among TRPs 208. For example, cooperation may be preset within a TRP and/or across TRPs via the ANC 202. According to aspects, no inter-TRP interface may be needed/present.
  • a dynamic configuration of split logical functions may be present within the architecture 200.
  • the Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and a Physical (PHY) layers may be adaptably placed at the DU or CU (e.g., TRP or ANC, respectively).
  • a BS may include a central unit (CU) (e.g., ANC 202) and/or one or more distributed units (e.g., one or more TRPs 208).
  • CU central unit
  • distributed units e.g., one or more TRPs 208.
  • FIG. 3 illustrates an example physical architecture of a distributed RAN 300, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 302 may host core network functions.
  • the C-CU may be centrally deployed.
  • C-CU functionality may be offloaded (e.g., to advanced wireless services (AWS)), to handle peak capacity.
  • AWS advanced wireless services
  • a centralized RAN unit (C-RU) 304 may host one or more ANC functions.
  • the C-RU may host core network functions locally.
  • the C-RU may have distributed deployment.
  • the C-RU may be closer to the network edge.
  • a DU 306 may host one or more TRPs (edge node (EN), an edge unit (EU), a radio head (RH), a smart radio head (SRH), or the like).
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • FIG. 4 illustrates example components of the BS 110 and UE 120 illustrated in FIG. 1, which may be used to implement aspects of the present disclosure.
  • the BS may include a TRP or gNB.
  • antennas 452, DEMOD/MOD 454, processors 466, 458, 464, and/or controller/processor 480 of the UE 120 may be used to perform the operations described herein and illustrated with reference to FIGs. 9 and 11-12.
  • antennas 434, DEMOD/MOD 432, processors 430, 420, 438 and/or controller/processor 440 of the BS 110 may be used to perform the operations described herein and illustrated with reference to FIGs. 10-12.
  • one or more of the antennas 452, DEMOD/MOD 454, processors 466, 458, 464, and/or controller/processor 480 of the UE 120 may be configured to perform the operations described herein for UE beam-based tagging.
  • one or more of the 434, DEMOD/MOD 432, processors 430, 420, 438 and/or controller/processor 440 of the BS 110 may be configured to perform the operations described herein.
  • the base station 110 may be the macro BS 110c in FIG. 1, and the UE 120 may be the UE 120y.
  • the base station 110 may also be a base station of some other type.
  • the base station 110 may be equipped with antennas 434a through 434t, and the UE 120 may be equipped with antennas 452a through 452r.
  • a transmit processor 420 may receive data from a data source 412 and control information from a controller/processor 440.
  • the control information may be for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), etc.
  • the data may be for the Physical Downlink Shared Channel (PDSCH), etc.
  • the processor 420 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 420 may also generate reference symbols, e.g., for the PSS, SSS, and cell-specific reference signal (CRS).
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 432a through 432t.
  • Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream.
  • Each modulator 432 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 432a through 432t may be transmitted via the antennas 434a through 434t, respectively.
  • the antennas 452a through 452r may receive the downlink signals from the base station 110 and may provide received signals to the demodulators (DEMODs) 454a through 454r, respectively.
  • Each demodulator 454 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator 454 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols.
  • a MIMO detector 456 may obtain received symbols from all the demodulators 454a through 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 460, and provide decoded control information to a controller/processor 480.
  • a transmit processor 464 may receive and process data (e.g., for the Physical Uplink Shared Channel (PUSCH)) from a data source 462 and control information (e.g., for the Physical Uplink Control Channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466 if applicable, further processed by the demodulators 454a through 454r (e.g., for SC-FDM, etc.), and transmitted to the base station 110.
  • the uplink signals from the UE 120 may be received by the antennas 434, processed by the modulators 432, detected by a MIMO detector 436 if applicable, and further processed by a receive processor 438 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 438 may provide the decoded data to a data sink 439 and the decoded control information to the controller/processor 440.
  • the controllers/processors 440 and 480 may direct the operation at the base station 110 and the UE 120, respectively.
  • a scheduler 444 may schedule UEs for data transmission on the downlink and/or uplink.
  • the processor 480 and/or other processors and modules at the UE 120 may perform or direct, e.g., the execution of the functional blocks illustrated in FIGs. 9 and 10, and/or other processes for the techniques described herein and those illustrated in the appended drawings.
  • the processor 440 and/or other processors and modules at the BS 110 may perform or direct processes for the techniques described herein and those illustrated in the appended drawings.
  • the memories 442 and 482 may store data and program codes for the BS 110 and the UE 120, respectively.
  • FIG. 5 illustrates a diagram 500 showing examples for implementing a communications protocol stack, according to aspects of the present disclosure.
  • the illustrated communications protocol stacks may be implemented by devices operating in a 5G system.
  • Diagram 500 illustrates a communications protocol stack including a Radio Resource Control (RRC) layer 510, a Packet Data Convergence Protocol (PDCP) layer 515, a Radio Link Control (RLC) layer 520, a Medium Access Control (MAC) layer 525, and a Physical (PHY) layer 530.
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • the layers of a protocol stack may be implemented as separate modules of software, portions of a processor or ASIC, portions of non-collocated devices connected by a communications link, or various combinations thereof. Collocated and non-collocated implementations may be used, for example, in a protocol stack for a network access device (e.g., AN
  • a first option 505-a shows a split implementation of a protocol stack, in which implementation of the protocol stack is split between a centralized network access device (e.g., an ANC 202 in FIG. 2) and distributed network access device (e.g., DU 208 in FIG. 2).
  • a centralized network access device e.g., an ANC 202 in FIG. 2
  • distributed network access device e.g., DU 208 in FIG. 2
  • an RRC layer 510 and a PDCP layer 515 may be implemented by the central unit
  • an RLC layer 520, a MAC layer 525, and a PHY layer 530 may be implemented by the DU.
  • the CU and the DU may be collocated or non-collocated.
  • the first option 505-a may be useful in a macro cell, micro cell, or pico cell deployment.
  • a second option 505-b shows a unified implementation of a protocol stack, in which the protocol stack is implemented in a single network access device (e.g., access node (AN), new radio base station (NR BS), a new radio Node-B (NR NB), a network node (NN), or the like.).
  • the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530 may each be implemented by the AN.
  • the second option 505-b may be useful in a femto cell deployment.
  • a UE may implement an entire protocol stack (e.g., the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530).
  • an entire protocol stack e.g., the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530.
  • FIG. 6 is a diagram 600 showing an example of a DL-centric subframe.
  • the DL-centric subframe may include a control portion 602.
  • the control portion 602 may exist in the initial or beginning portion of the DL-centric subframe.
  • the control portion 602 may include various scheduling information and/or control information corresponding to various portions of the DL-centric subframe.
  • the control portion 602 may be a physical DL control channel (PDCCH), as indicated in FIG. 6.
  • the DL-centric subframe may also include a DL data portion 604.
  • the DL data portion 604 may sometimes be referred to as the payload of the DL-centric subframe.
  • the DL data portion 604 may include the communication resources utilized to communicate DL data from the scheduling entity (e.g., UE or BS) to the subordinate entity (e.g., UE).
  • the DL data portion 604 may be a physical DL shared channel (PDSCH).
  • PDSCH physical DL shared channel
  • the DL-centric subframe may also include a common UL portion 606.
  • the common UL portion 606 may sometimes be referred to as an UL burst, a common UL burst, and/or various other suitable terms.
  • the common UL portion 606 may include feedback information corresponding to various other portions of the DL-centric subframe.
  • the common UL portion 606 may include feedback information corresponding to the control portion 602.
  • Non-limiting examples of feedback information may include an ACK signal, a NACK signal, a HARQ indicator, and/or various other suitable types of information.
  • the common UL portion 606 may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, scheduling requests (SRs), and various other suitable types of information.
  • RACH random access channel
  • SRs scheduling requests
  • the end of the DL data portion 604 may be separated in time from the beginning of the common UL portion 606.
  • This time separation may sometimes be referred to as a gap, a guard period, a guard interval, and/or various other suitable terms.
  • This separation provides time for the switch-over from DL communication (e.g., reception operation by the subordinate entity (e.g., UE)) to UL communication (e.g., transmission by the subordinate entity (e.g., UE)).
  • DL communication e.g., reception operation by the subordinate entity (e.g., UE)
  • UL communication e.g., transmission by the subordinate entity (e.g., UE)
  • FIG. 7 is a diagram 700 showing an example of an UL-centric subframe.
  • the UL-centric subframe may include a control portion 702.
  • the control portion 702 may exist in the initial or beginning portion of the UL-centric subframe.
  • the control portion 702 in FIG. 7 may be similar to the control portion 602 described above with reference to FIG. 6.
  • the UL-centric subframe may also include an UL data portion 704.
  • the UL data portion 704 may sometimes be referred to as the payload of the UL-centric subframe.
  • the UL portion may refer to the communication resources utilized to communicate UL data from the subordinate entity (e.g., UE) to the scheduling entity (e.g., UE or BS).
  • the end of the control portion 702 may be separated in time from the beginning of the UL data portion 704. This time separation may sometimes be referred to as a gap, guard period, guard interval, and/or various other suitable terms. This separation provides time for the switch-over from DL communication (e.g., reception operation by the scheduling entity) to UL communication (e.g., transmission by the scheduling entity).
  • the UL-centric subframe may also include a common UL portion 706.
  • the common UL portion 706 in FIG. 7 may be similar to the common UL portion 606 described above with reference to FIG. 6.
  • the common UL portion 706 may additionally or alternatively include information pertaining to channel quality indicator (CQI), sounding reference signals (SRSs), and various other suitable types of information.
  • CQI channel quality indicator
  • SRSs sounding reference signals
  • One of ordinary skill in the art will understand that the foregoing is merely one example of an UL-centric subframe and alternative structures having similar features may exist without necessarily deviating from the aspects described herein.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS), even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum).
  • a UE may operate in various radio resource configurations, including a configuration associated with transmitting pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc.) or a configuration associated with transmitting pilots using a common set of resources (e.g., an RRC common state, etc.).
  • RRC radio resource control
  • the UE may select a dedicated set of resources for transmitting a pilot signal to a network.
  • the UE may select a common set of resources for transmitting a pilot signal to the network.
  • a pilot signal transmitted by the UE may be received by one or more network access devices, such as an AN, or a DU, or portions thereof.
  • Each receiving network access device may be configured to receive and measure pilot signals transmitted on the common set of resources, and also receive and measure pilot signals transmitted on dedicated sets of resources allocated to the UEs for which the network access device is a member of a monitoring set of network access devices for the UE.
  • One or more of the receiving network access devices, or a CU to which receiving network access device(s) transmit the measurements of the pilot signals may use the measurements to identify serving cells for the UEs, or to initiate a change of serving cell for one or more of the UEs.
  • NR-SS NR synchronization signals
  • NR-SS NR synchronization channels
  • a set of consecutive OFDM symbols carrying different types of synch signals e.g., primary synchronization signal (PSS), secondary synchronization signal (SSS), time synchronization signal (TSS), PBCH
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • TSS time synchronization signal
  • PBCH PBCH
  • SS block a set of one or more SS blocks may form an SS burst.
  • different SS blocks may be transmitted on different beams to achieve beam- sweeping for synch signals, which may be used by a UE to quickly identify and acquire a cell.
  • one or more of the channels in an SS block may be used for measurements. Such measurements may be used for various purposes such as radio link management (RLM), beam management, etc.
  • RLM radio link management
  • a UE may measure the cell quality and report the quality back in the form of a measurement report, which may be used by the base station for beam management and other purposes.
  • FIG. 8 illustrates an example transmission timeline 800 of synchronization signals for a new radio telecommunications system, in accordance with aspects of the present disclosure.
  • a BS such as BS 110 shown in FIG. 1, may transmit an SS burst 802 during a period 806 of Y ⁇ , in accordance with certain aspects of the present disclosure.
  • Operations 800 begin, at 802, by transmitting a synchronization signal (SS) burst.
  • the SS burst may include N SS blocks 804 with indices of zero to N-l, and the BS may transmit different SS blocks of the burst using different transmit beams (e.g., for beam-sweeping).
  • Each SS block may include, for example, a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and one or more physical broadcast channels (PBCHs), also referred to as synchronization channels.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCHs physical broadcast channels
  • the BS may transmit SS bursts on a periodic basis, with a period 808 of X msec.
  • FIG. 9 illustrates an example resource mapping 900 for an exemplary SS block 902, in accordance with aspects of the present disclosure.
  • the exemplary SS block may be transmitted by a BS, such as BS 110 in FIG. 1, over a period 904 (e.g., Y ⁇ , as shown in FIG. 8).
  • the exemplary SS block includes a PSS 910, an SSS 912, and two PBCHs 920 and 922, although the disclosure is not so limited, and an SS block may include more or fewer synchronization signals and synchronization channels.
  • a transmission bandwidth (Bl) of the PBCHs may be different from a transmission bandwidth (B2) of the synchronization signals.
  • the transmission bandwidth of the PBCHs may be 288 tones, while the transmission bandwidth of the PSS and SSS may be 127 tones.
  • SS block consists of PSS, SSS and PBCH (and DMRS for PBCH). These signals are multiplexed in time-domain. There are different synchronization modes: initial acquisition in standalone, initial acquisition in non-standalone, and Synchronization in idle or connected modes.
  • aspects of the present disclosure provide techniques that utilize frequency division multiplexing (FDM) to simultaneously transmit multiple SS blocks in different frequency locations.
  • FDM frequency division multiplexing
  • FDM generally refers to a process by which a total bandwidth that is available in a communications platform is divided into a series of sub-bands. The division typically occurs such that the sub-bands do not overlap. As such, each of the sub-bands carry a separate signal within the sub-band.
  • different SS blocks may be sent simultaneously (using a same beam or different beams) using different frequency resources, such as different component carriers (CCs).
  • CCs component carriers
  • SS blocks may be supported for different operating bandwidths. For example, certain design targets may allow for 4 SS blocks (beams) for frequency bands below 3 GHz. For frequency bands between 3 and 6 GHz, a maximum of 8 SS blocks (beams) may be supported. For frequency bands over 6 GHz, 64 SS blocks (beams) may be supported.
  • a gNB may decide that particular SS blocks should be transmitted or may not be transmitted. The decision may be based on a number of factors, such as how rapidly channel conditions are changing that would prompt beam refinement.
  • a gNB may be able to transmit (SS blocks using) multiple beams simultaneously.
  • a gNB may have multiple antenna panels. The panels, for example, can allow a gNB to transmit using different frequency resources (e.g., > 6GHz, sub 6GHz, mmW) and/or in different directions (using different ports or beams).
  • aspects of the present disclosure may enable a UE may be able to reduce SS block measurement windows. Reducing the measurement windows, allowing the UE to finish measurements in as short a time as possible, may be beneficial in many cases (e.g., resulting in quicker initial access and/or quicker measurement and reporting which may lead to improved system performance and reduced power consumption).
  • a gNB can sweep multiple beams (frequencies) at the same time while a wideband UE can measure multiple beams (sent using different frequency resources) simultaneously.
  • the methods provided herein also provide a mechanism wherein a system receives capability information indicating one or more UE are capable of wideband processing.
  • the network may transmit SS blocks, via multiple beams, using FDM based on the capability information. Such information may be sent by the UE to the system upon receipt of the SS block, as a non- limiting example.
  • the system may also provide for signaling to the one or more UEs that SS blocks are transmitted using FDM.
  • Such signaling may also include an indication of what resources are used for transmitting which SS blocks, in which symbols, for example, as a mapping between SS block indices and beams. Using this information, the network and UE may be in synch regarding what resources are used to transit which SS blocks, allowing the UE to properly report the measurements.
  • This information may be signaled to a UE, for example, as (cell-specific) system information, such as remaining minimum system information (RMSI) or other system information (OSI).
  • RMSI remaining minimum system information
  • OSI system information
  • this information could be delivered via UE-specific signaling, such as radio resource control (RRC) signaling.
  • RRC radio resource control
  • the information signaled to a UE may provide an indication of what SS block measurements may be used to replace other SS block measurements.
  • such information may be referred to as measurement correspondence information (e.g., meaning a UE can perform measurement of one such SS block as an alternative to another corresponding SS block).
  • This information also, may be signaled to a UE, as system information or via RRC signaling.
  • FIG. 10 illustrates example operations 1000 that may be performed by a network entity, in accordance with certain aspects of the present disclosure.
  • Operations 1000 may be performed, for example, by a base station (e.g. a gNB) designed to participate in beamformed communications with one or more UE's.
  • a base station e.g. a gNB
  • Operations 1000 being, at 1002 by identifying one or more time intervals for transmitting synchronization signal (SS) blocks for one or more user equipments (UES) to use for at least one or initial access or measurement purposes.
  • the network entity transmits, within one of the time intervals, SS blocks at different frequency locations using frequency division multiplexing (FDM).
  • FDM frequency division multiplexing
  • FIG. 11 illustrates example operations 1100 that may be performed by a user equipment (UE), in accordance with certain aspects of the present disclosure.
  • Operations 1100 may be performed, for example, by a user equipment (e.g. UE 120) capable of participating in beamformed communications with a base station (e.g., a gNB) performing operations 1000 described above.
  • a user equipment e.g. UE 120
  • a base station e.g., a gNB
  • Operations 1100 begin, at 1102 by receiving, within one of time intervals, synchronization signal (SS) blocks transmitted at different frequency locations using frequency division multiplexing.
  • SS synchronization signal
  • the UE performs at least one of initial access or measurement based on the SS blocks.
  • FIG. 12 illustrates an example graph (of frequency vs. time) that shows how FDM may be used to simultaneously transmit multiple SS blocks in different beams, and reduce a measurement window (as illustrated by the dashedbox).
  • 8 SS blocks are sent via FDM across four component carriers (CC0-CC3).
  • each SS block is associated with a SS block index and an index of an actual beam (port) being used.
  • the eight ports are pO, pi, p2, p3, p4, p5, p6 and p7.
  • the gNB has four (4) panels (the system can transmit four (4) beams at the same time).
  • the SS block index to beam/port index is staggered during time transmission so that the gNB can transmit and finish the four (4) beams at a given time.
  • SS blocks sent via different ports are staggered.
  • an SS block with index bO may be simultaneously sent via port pO on CCO, via port p2 on CC1, via port p4 on CC2, and via port p6 on CC3.
  • an SS block with index bl may be simultaneously sent via port pi on CCO, via port p3 on CC1, via port p5 on CC2, and via port p7 on CC3,
  • time interval may refer to a time period sufficient to transmit an SS block and its duration may be defined, for example, as a number of symbols.
  • the arrangements and methods provided herein may also be modified such that if a presence of a wideband UE is not present, the FDM transmissions of multiple SS blocks simultaneously may be modified or stopped.
  • the SS block transmissions may be used solely for synchronization or, in other embodiments, the signals may be used for measurements, as applicable.
  • the network therefore, (as shown in FIG. 8) can transmit multiple synchronization signals, such as a Primary Synchronization Signal, a Secondary Synchronization Signal or a Physical Broad Cast Channel (PBCH) signal at different frequencies.
  • PBCH Physical Broad Cast Channel
  • the number of frequencies can be chosen by the network and may be governed by the arrangements provided for transmission.
  • the network can use different beams for the same SSB index at different frequencies.
  • the network may also inform the UE of information the UE can use to determine what SS blocks will be transmitted using which resources.
  • the information may include a mapping between the SSB index and the port used.
  • the mapping may indicate which SS blocks transmitted within a given time interval.
  • the mapping may indicate a same SS block index is transmitted at different frequency locations using different beams within a same time interval (as shown in FIG. 12).
  • the mapping may indicate different SS blocks with different indices may be transmitted at different frequency locations using different beams within the same time interval.
  • this information may be signaled to a UE as (cell-specific) system information (e.g., RMSI or OSI) or via UE-specific signaling (e.g., RRC signaling).
  • the network may inform the UE whether simultaneous transmission of SS bocks via FDM can be used to reduce the UE measurement window.
  • a UE may indicate its ability to perform wideband measurement and, in response, the network may enable simultaneous transmission of SS bocks via FDM.
  • the number of beams used may vary according to specific frequency bands. In different embodiments, 4, 8 or 64 beams may be used during transmission according to current system/industry standards. Alterations from industry standards are also contemplated and are within the scope of the disclosure. Greater or lesser numbers of beams may be used while still preserving the capability to reduce UE measurement windows. For example, frequency bands above 6 GHz may be broken into further sub-sets and a corresponding number of SS blocks may be provided to these subsets, thus the embodiments provided are merely descriptive of the possibilities. In a likewise manner, the arrangements described, include the number of antennas (panels) may be increased based upon the corresponding number of SS blocks required to be processed.
  • a UE may also be configured to reduce a measurement window by processing SS blocks sent via FDM using different sets of ports in different time intervals.
  • the UE may be configured with what may be referred to herein as measurement correspondence information.
  • measurement correspondence generally refers to the measurement of first beam index k on a first frequency (e.g., frequency 1) that can be replaced by the measurement of a second beam index j on a second frequency (e.g., frequency 2).
  • first frequency e.g., frequency 1
  • second frequency e.g., frequency 2
  • a UE may effectively replace the measurement of one SS block with another (based on the measurement correspondence information), rather than actually take both measurements.
  • the measurement correspondence information may indicate two SS block measurements may be interchangeable, for example, if channel conditions experienced on those SS block transmissions is expected to be substantially the same (e.g., if it may be said those SS blocks are quasi-collocated or QCL).
  • a detailed configuration (of the measurement correspondence information) may be explicitly signaled to the UE (e.g., via system information or UE specific signaling).
  • the detailed configuration may be implicit (e.g., specified in a standard) or a UE may be configured with a plurality of detailed configurations and may be signaled which one to use (e.g., via an index).
  • the UE may then perform measurement of SS blocks transmitted via FDM in accordance with the configuration.
  • the methods disclosed herein comprise one or more steps or actions for achieving the described method.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to "at least one of a list of items refers to any combination of those items, including single members.
  • "at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component(s) and/or module(s), including, but not limited to a circuit, an application specific integrated circuit (ASIC), or processor.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general- purpose processor may be a microprocessor, but in the altemative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • an example hardware configuration may comprise a processing system in a wireless node.
  • the processing system may be implemented with a bus architecture.
  • the bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints.
  • the bus may link together various circuits including a processor, machine-readable media, and a bus interface.
  • the bus interface may be used to connect a network adapter, among other things, to the processing system via the bus.
  • the network adapter may be used to implement the signal processing functions of the PHY layer.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • the bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further.
  • the processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.
  • the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium.
  • Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • the processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media.
  • a computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
  • the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface.
  • the machine-readable media, or any portion thereof may be integrated into the processor, such as the case may be with cache and/or general register files.
  • machine-readable storage media may include, by way of example, RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM PROM
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • registers magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • the machine-readable media may be embodied in a computer-program product.
  • a software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
  • the computer-readable media may comprise a number of software modules.
  • the software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions.
  • the software modules may include a transmission module and a receiving module.
  • Each software module may reside in a single storage device or be distributed across multiple storage devices.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • the processor may load some of the instructions into cache to increase access speed.
  • One or more cache lines may then be loaded into a general register file for execution by the processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media).
  • computer-readable media may comprise transitory computer-readable media (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein.
  • instructions for perform the operations described herein and the appended figures may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein.
  • modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.), such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des aspects de la présente invention concernent des techniques de transmission et de traitement de signaux de synchronisation (SS) à des fins différentes. Dans certains cas, la transmission simultanée d'une pluralité de blocs SS au moyen d'un multiplexage par répartition en fréquence (FDM), et éventuellement de différents faisceaux, peut permettre à un UE de réduire une fenêtre de mesure.
EP18759201.9A 2017-08-18 2018-07-31 Signaux de synchronisation (ss) à multiplexage par répartition en fréquence pour un fonctionnement à large bande Pending EP3669482A1 (fr)

Applications Claiming Priority (4)

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US201762547726P 2017-08-18 2017-08-18
US201762549402P 2017-08-23 2017-08-23
US16/007,704 US10763984B2 (en) 2017-08-18 2018-06-13 Frequency division multiplexing synchronization signals (SS) for wideband operation
PCT/US2018/044652 WO2019036184A1 (fr) 2017-08-18 2018-07-31 Signaux de synchronisation (ss) à multiplexage par répartition en fréquence pour un fonctionnement à large bande

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EP3669482A1 true EP3669482A1 (fr) 2020-06-24

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US (1) US10763984B2 (fr)
EP (1) EP3669482A1 (fr)
CN (1) CN111052659B (fr)
TW (1) TW201921999A (fr)
WO (1) WO2019036184A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111818631B (zh) * 2016-01-26 2021-12-03 华为技术有限公司 识别同步信息的方法、通信方法和装置、可读存储介质
US11096102B2 (en) * 2017-06-19 2021-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Measurements considering SS block configuration
JP6970821B2 (ja) * 2017-10-02 2021-11-24 ノキア テクノロジーズ オサケユイチア 無線ネットワークのためのビーム固有および非ビーム固有同期信号ブロック位置
CN109451859B (zh) * 2017-10-11 2022-12-27 北京小米移动软件有限公司 对应关系的指示及确定方法、装置、基站和用户设备
CN111585729A (zh) * 2019-02-15 2020-08-25 电信科学技术研究院有限公司 一种信号的发送、接收方法、网络设备及终端
EP3965494A4 (fr) * 2019-06-14 2022-06-01 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé pour transmettre un canal/signal de liaison montante, dispositif de terminal et dispositif de réseau
CN112188446B (zh) * 2019-07-05 2022-04-08 大唐移动通信设备有限公司 一种同步信号发送方法、终端及装置、存储介质
US11838782B2 (en) * 2020-01-31 2023-12-05 Qualcomm Incorporated Measurements on a first band applicable to procedures on a second band
CN115669126A (zh) * 2020-07-30 2023-01-31 Oppo广东移动通信有限公司 无线通信方法、终端设备和网络设备
CN112147704B (zh) * 2020-09-27 2023-01-06 上海特金无线技术有限公司 探测无人机的方法、装置及设备、存储介质
US11552718B2 (en) * 2021-05-12 2023-01-10 Qualcomm Incorporated Beam refinement and localization using true-time-delay analog arrays
US11956835B2 (en) * 2021-10-05 2024-04-09 Qualcomm Incorporated Beamforming configurations for random access channel configuration

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5046317B2 (ja) * 2006-04-27 2012-10-10 住友電気工業株式会社 受信機、送信機、伝送システム、及び伝送方法
JP4913641B2 (ja) * 2007-03-20 2012-04-11 株式会社エヌ・ティ・ティ・ドコモ 基地局、通信端末、送信方法、受信方法、通信システム
US9713060B2 (en) 2012-11-07 2017-07-18 Avago Technologies General Ip (Singapore) Pte. Ltd. Small cell initial access and physical cell identity determination
WO2015093821A1 (fr) * 2013-12-16 2015-06-25 Samsung Electronics Co., Ltd. Procédé et système d'acquisition améliorée de cellules dans un système de communications
US10219270B2 (en) * 2015-09-04 2019-02-26 Qualcomm Incorporated Enabling operation of variable bandwidth users in millimeter-wave systems
US11089579B2 (en) * 2016-01-13 2021-08-10 Samsung Electronics Co., Ltd. Method and apparatus for supporting multiple services in advanced MIMO communication systems
US10219231B2 (en) * 2016-07-27 2019-02-26 Futurewei Technologies, Inc. System and method for beamformed broadcast and synchronization signals in massive multiple input multiple output communications systems

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TW201921999A (zh) 2019-06-01
CN111052659B (zh) 2022-09-16
CN111052659A (zh) 2020-04-21
US20190058538A1 (en) 2019-02-21
WO2019036184A1 (fr) 2019-02-21
US10763984B2 (en) 2020-09-01

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